RU2018118458A - TWO-STAGE SPHERICAL VIBRATION INSULATOR - Google Patents

Claims (4)

1. A two-stage spherical vibration isolator, made in the form of a two-stage frame, consisting of sequentially connected and identical frames: the upper and lower frames, with the upper and lower elastic damping elements respectively arranged in the form of cylindrical coil springs, the turns of which are coated with vibration damping material, for example polyurethane, characterized in that the upper and lower frames are made in the form of eccentrically arranged, rigid spherical shells: upper and lower wafers, while the upper ends of the upper and lower elastic damping elements are fixed on the inner surface of the spherical shells by sectors made of material with adhesive and vibration damping properties, for example polyurethane, while the peripheral parts of the spherical shells are connected by at least two inclined elastic elements made of a material with adhesive and vibration damping properties, for example, polyurethane, and the lower spherical shell of the vibration isolator is connected to the base in the middle The use of vertical elastic elements made in the form of cylindrical coil springs. 2. The two-stage spherical vibration isolator according to claim 1, characterized in that the lower elastic damping element is made in the form of a dry friction vibration isolator and contains an elastic element, a housing and a dry friction damper, the housing is made in the form of two opposed cylindrical coil springs of the upper and lower bushings, fixing the spring with its outer surface, and the dry friction damper is made in the form of at least three elastic petals, rigidly connected to the lower sleeve, and covering with a certain or the outer surface of the spring, comprising a spring housing made of a helical, hollow, and elastic steel tube, inside of which at least one additional elastic steel tube is coaxially and axisymmetrically installed with a gap, and at least one is located in the gaps between the tubes friction element, while the surfaces of the spring housing and the additional elastic steel tube are in contact with the surfaces of the friction elements, and their axis coincides with the axis of the turns of the housing, and centrally, coaxially and axially symmetrically to the case, a screw elastic rod is located, made solid, in the form of a coil spring with a step less by 5 ÷ 10% of the pitch of the case helical line, to create an interference fit that provides the functional purpose of the friction elements, and the friction elements are made tubular, and the inside of the vibration isolation lobes are covered a layer of sintered friction material made on the basis of copper, containing zinc, iron, lead, graphite, vermiculite, copper, chromium, antimony and silicon, in the following ratio of components, wt. %: zinc 6.0 ÷ 8.0; iron 0.1 ÷ 0.2; lead 2.0 ÷ 4.0; graphite 3.0 ÷ 7.0; vermiculite 8.0 ÷ 12.0; chrome 4.0 ÷ 6.0; antimony 0.05 ÷ 0.1; silicon 2.0 ÷ 3.0; copper - the rest, and the friction element located in the gaps between the tubes is made of friction material, including the following components, with their ratio, in wt. %: a mixture of rezol and novolac phenol-formaldehyde resins in the ratio 1: (0.2-1.0) - 8 ÷ 34%; fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in a ratio of 1: (0.1-1.0) - 12 ÷ 19%; graphite - 7 ÷ 18%; a friction modifier containing carbon black in the form of a mixture with kaolin and silicon dioxide - 7 ÷ 15%; barite concentrate - 20 ÷ 35%; talc - 1.5 ÷ 3.0%. 3. The two-stage spherical vibration isolator according to claim 1, characterized in that the upper elastic damping element is made in the form of a cylindrical spring, consisting of two parts with opposite ends, one part of which has turns of rectangular cross section, and the other part of the spring is hollow, with this counter-directed end of the first part is placed in the cavity of the second, the gaps of the segment profile of the contacting parts of the spring are filled with antifriction grease, while at the end of the second part of the spring is installed a sealant a cuff to prevent lubricant leakage, and the first part of the coil spring made with coils of rectangular cross section with rounded edges covers a tube of damping material, such as polyurethane, gaps in the first part of a coil spring made with coils of rectangular cross section, which covers a tube of damping material, filled with crumbs of friction material, gaps, in the first part of the coil spring, made with coils of rectangular cross section, which is covered by a tube of damping material iala filled grit friction material made of a composition comprising the following components in their ratio in wt. %: mixture of resol and novolac phenol formaldehyde pitches in the ratio 1: (0.2-1.0) 28 ÷ 34 fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in a ratio of 1: (0.1-1.0) 12 ÷ 19 graphite 7 ÷ 18 carbon black friction modifier in the form of a mixture with kaolin and silicon dioxide 7 ÷ 15 barite concentrate 20 ÷ 35 talc 1.5 ÷ 3.0